Construct 3 doesn't work offline

installed construct as an app

Sometimes it shows the error that you do not have an internet connection, but even if you will open the app, the game preview will not start with the message "failed to start the preview"

it is a big problem

another big minus of the browser conception of the construct

Make sure you wait for the "ready to use offline" message when loading a new version. Otherwise it won't have finished saving it for use offline. If you did see that message then everything should work offline.